Fire-alarm.



D. MOCLANAHAN.

FIRE ALARM.

APPLIGATION FILED MAR. 20, 1914.

1,1 32,103. Patented Mar. 16, 1915.

DAVID McCLANAI-IAN, 0F STACY, VIRGINIA.

rma-ALARM.

Specification of Letters Patent.

Patented Mar. 16-, 1915.

Application filed March 20, 1914. Serial No. 826,075.

T all whom it may concern Be it known that 1, DAVID MCCLANAHAN, a citizen of the United States, residing at Stacy, in the county of Buchanan, State of Virginia, have invented certain new and useful Improvements in Fire-Alarms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relatesto fire alarms and has special reference to that type of fire alarm which is designed to ring a bell and simultaneously display a signal upon the severing of a strand of material adapted to be burnt in two or melted by the action of the fire or heat.

The principal object of the invention is to provide a novel form of lire alarm of this description which is adapted for use in connection with several rooms or stations and wherein spring means is used to hold the flexible strands under tension, the same spring means serving to close a circuit closer and audible alarm.

(Vith the above and other objects in view the invention consists in general of certain novel details of construction and combination of parts hereinafter fully described, illustrated in the accompanying drawings, and specifically claimed.

In the accompanying drawings, like charactors of reference indicate like parts in the several views, and Figure l is a general diagrammatic View showing the wiring system used in connection with this invention. Fig. 2 is a front view of the alarm box showing the door closed and one of the visual signals displayed. Fig. 3 is a similar view show ing the door open to disclose the interior of said box. Fig. 4 is a section on the line -l-l of Fig. 3.

In carrying out the objects of this invention there is provided a box or casing 10 the front of which is closed by a door 11 having a sight opening 12 therein, said sight opening preferably covered with glass or other transparent material. This door 18 hinged to the box in the usual manner and is provided with any suitable form of catch or lock. On the front of the door there is provided an alarm hell or gong 13 which is referably of large size so as to be heard rom all parts of the house when operated.

provided with a suitable series of openings to receive the push buttons 21. Fixed to the shelf 20 are a series of springs 22 each spring being located immediately above a respective push button 21 and having a forward end bent downward and provided with a number or other indication as at 22', the

downwardly bent end lying at right angles to the body of the spring and being so-ar-- ranged as to be displayed through the sight opening 12 when the spring is depressed. In order to' hold these springs normally raised and consequently the contacts open, there is attached to each one of these springs a strand .24 which passes through a suitable opening in the top of the box and is led around the walls of the room which it is desired to protect. This strand is either made of some material, such as cord, which will readily burn, or may be made of some material which melts under low heat or preferably of such material in the manner usual in such devices.

in operation, whenever the strand 24;, in any room, is severed by reason of fire in that room then the spring is free to Work and the front end of the spring drops down exposing the numbered portion 22' through the sight opening 12. At the same time the action of the spring pushes down on the push button and closes the circuit through the bell 13 thus sounding the alarm. The occupants of the house can then step to the alarm and see at once which room-is on fire and take the usual measures to put out such the. i

There has thus been provided a simple and etlicient device of the kind described and of the character specified It will be obvious that many minor changes may be made in the 'iplnl and con struction of this invention \v'ithout departing from the material principles, thereof.

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l3 not ii'ng: :re desired lo mnline the i11-- Q-"tion to {la ICi; forn'i herein :alzmvn and 1 wa ed, ut is wished to include all such we amel-1y within the svope claimed ;:u in than described the invention, what i. l mi new drmribafd, Ml with a sl nt opening, a mounted \rnbin .llll r11, donnnardl) bent ends; nor-- 's glit, opening g said end: cable said attached to a re he name und tenllj'il to a fixed oban to be protected moving" said Mai t a respwin'i pr n t in mm, i llnol m d ubjwil within llli room ment of said spring to relaxed position, said circuit closer being included in an alarm circuit;

3, In a device of the kind described, a waning, a shell arranged within said casing, an alarm carried by aaid easing, a series of spring e ntaets fixed on said shelf and connected in multiple to said alarm, a battery, a seeond ShillFS of spring ('ontaets fixed 0n 'sail' alwlf and eonnerted in multiple to said bati'vr y, a connection between said battery and alarm, said Contact being normally open, :1 smi'ond sholf supported above the first shell, a series of buttons movable through the secmnl shelf to olose respective pairs of contacts, springs fixed to the SQCODd Rbel'f and adapted to urge said buttons down and ljiOS) the contaizt, and severable means for wall-aiming said springs from action on and 13m said means; being sewrable nrder ilze inllneiwe of beat.

it tesiimony whereof I allix my signaw in the piivemiue of two \x'itne aes.

HA V11) l\l(( ILANAIIAN.

Wit: WHSOS llrnan than Mill IaN nAN. 

